(!!) (#1 244A Pair 1930's - 1940) 244A Western Electric NOS ST-14 "Engraved Base" 1930's - 1940 (4.1ma and 5ma) (matched on Amplitrex)
(!!) (#1 244A PAIR) USN-CW-244A Western Electric NOS 1952 (4.0ma and 4.3ma)
(!) 244A Western Electric NOS 1952 smaller side getter (4.4ma)
